TrustStore Not Found - InvalidAlgorithmParameterException EVEN if javax.net.ssl.trustStore is define

Folks -

I'm a weblogic Sys Admin 10.3.0.0 and in our startweblogic  we already define  -Djavax.net.ssl.trustStore=/apps/home/TrustStore.jks  - which is valid and is trusting all CAs needed.  Also just to cover all bases, our JRE lib security cacerts also is made available and trusting all necessary CAs

but at runtime, SSLHandshake does not happen to a web service SOAP call, it gives InvalidAlgorithmParameterException Trustore must not be empty.

when javax.net.ssl  is set to DEBUG, I see that it doesn't pick up that truststore and it gives this.. as you see trustStore picked is empty. Where does it get it?  Why is it not picking up the option added in JVM start? nor the JRE cacerts?